Camera viewfinder accessory mount

Abstract

A camera viewfinder accessory mount in accordance with the invention includes a receiver mountable at least in part around a camera viewfinder frame. Thread units extend from the receiver. The thread units are defined by extensions having outside threads and inside geometric surfaces. A body portion of the accessory mount has a receiver end for matingly fitting the receiver, and a distal accessory end. The body portion further includes an indexing periphery having a peripheral shape for cooperating with the inside geometric surfaces of the thread units. The body portion also includes a stop radially extending from the periphery and spacedly disposed from the receiver end. A tightening wheel of the accessory mount has internal threads cooperable with the outside threads of the thread units to tighten the body portion receiver end to the camera viewfinder frame.

1. A camera viewfinder accessory mount comprising:
 a receiver mountable at least in part around a camera viewfinder frame; 
 thread units extending from said receiver; 
 said thread units being defined by extensions having outside threads and inside geometric surfaces; 
 a body portion having a receiver end for matingly fitting said receiver, and a distal accessory end; 
 said body portion having an indexing periphery having a peripheral shape for cooperating with said inside geometric surfaces of said thread units; 
 said body portion also including a stop radially extending from said periphery and spacedly disposed from said receiver end; and 
 a tightening wheel having internal threads cooperable with said outside threads of said thread units to tighten said body portion receiver end to the camera viewfinder frame. 
 
     
     
       2. The camera viewfinder accessory mount of  claim 1 , wherein said receiver includes a generally U-shaped groove. 
     
     
       3. The camera viewfinder accessory mount of  claim 1 , wherein said stop is disposed at corners of said body portion. 
     
     
       4. The camera viewfinder accessory mount of  claim 1 , wherein said body portion includes guides that support said thread units. 
     
     
       5. The camera viewfinder accessory mount of  claim 1 , wherein said body portion is fixedly connected to a camera viewfinder accessory. 
     
     
       6. The camera viewfinder accessory mount of  claim 1 , wherein said body portion includes a lens therein. 
     
     
       7. The camera viewfinder accessory mount of  claim 1 , wherein said tightening wheel has a contoured outer gripping surface. 
     
     
       8. A method of mounting a camera viewfinder accessory on a camera having a viewfinder surrounded by a frame, the method comprising the steps of:
 providing a camera viewfinder accessory mount including a receiver mountable at least in part around the camera viewfinder frame, thread units extending from said receiver, said thread units being defined by extensions having outside threads and inside geometric surfaces, a body portion having a receiver end for matingly fitting said receiver, and a distal accessory end, said body portion having an indexing periphery having a peripheral shape for cooperating with said inside geometric surfaces of said thread units, said body portion also including a stop radially extending from said periphery and spacedly disposed from said receiver end, and a tightening wheel having internal threads cooperable with said outside threads of said thread units; 
 sliding a U-shaped groove of said receiver over the viewfinder frame; 
 connecting said body portion to the camera viewfinder accessory; 
 inserting said thread units into said indexing periphery of said body portion; 
 engaging said internal threads of said tightening wheel with said outside threads of said thread units; and 
 rotating said tightening wheel, causing said receiver to be drawn towards said body portion and urging the viewfinder frame against said body portion receiver end.